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Tap water quality report

Sheridan Lake Highlands, Inc.

EPA monitoring tested this supplier for 11 contaminants and detected 6. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

11
contaminants tested
6
detected
85
people served
24
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Pennington

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

24
health-based violations
51
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-04-01 → 2020-06-30
TT Health-based Resolved 2019-12-01 → 2019-12-16
TT Health-based Resolved 2019-12-01 → 2019-12-16
TT Health-based Resolved 2019-12-01 → 2019-12-16
TT Health-based Resolved 2019-11-01 → 2019-11-30
TT Health-based Resolved 2019-11-01 → 2019-11-30
TT Health-based Resolved 2019-11-01 → 2019-11-30
TT Health-based Resolved 2017-06-28

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
520.6 µg/L 40%
of the EPA limit 1300 µg/L
worst single sample: 809 µg/L
15/15 SYR4 2013–2019
Lead
7.1 µg/L 47%
of the EPA limit 15 µg/L
worst single sample: 11 µg/L
14/15 SYR4 2013–2019
Nitrate
4990 µg/L 50%
of the EPA limit 10000 µg/L
 12/12 SYR4 2017–2019
Lead
0.0070 mg/L 47%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
TTHM
82.3 µg/L 103%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 82.5 µg/L
9/9 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
67.06 µg/L 112%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 70.3 µg/L
7/8 SYR4 2012–2019
5 contaminants tested, none detected
Combined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UGross Beta Particle ActivityNitrite

Utility contact

Contact
AL SAGE
Phone
6053917483
Email
[email protected]

Frequently asked questions about Sheridan Lake Highlands, Inc.

Is Sheridan Lake Highlands, Inc. tap water safe to drink?

EPA monitoring detected 6 contaminants in Sheridan Lake Highlands, Inc.'s water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Sheridan Lake Highlands, Inc.'s water?

EPA monitoring detected Copper, Lead, Nitrate, Lead, TTHM, and others. The full list with the level and data source for each is above.

How many people does Sheridan Lake Highlands, Inc. serve?

Sheridan Lake Highlands, Inc. reports serving 85 people in South Dakota, per its EPA record.

Has Sheridan Lake Highlands, Inc. had any water quality violations?

The EPA has 51 violations on file for Sheridan Lake Highlands, Inc., of which 24 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.